Abstract:The full hydraulic suspension of vehicles,as a new- type technologicai instal- lation,has advantages of simple structure and good performance etc,This paper describesthe working principle of full hydraulic suspension taking methyl-silicone oil as a workmedium,main performance indexes,computer regression of characteristics and key techni- cal problems solved in the develipment work.Meanwhile, an introduction and assessmentof the industrial test results are made.